Anna plays Susan Pevensie, the second-eldest of four siblings sent away from home during the Second World War who stumble upon a wardrobe that gives them access to the magical world of Narnia.
Her elder brother, Peter, is played by an 18-year-old A-Level student, William Moseley.
Despite working together intensively, they insist that there was no romance."I love little Anna, but we've got so much respect for each other and we really quickly fell into the roles of brother and sister as soon as we started filming," says Moseley. "I don't think I'm going to reveal if I have a girlfriend."He might only be 18, but Moseley has already mastered the perfect film star response.
"Today I had a normal day at school, then I went to Armani Couture and spent three hours looking for a dress to wear to the premiere, then I went home to do my essays."If my friends are jealous, they don't show it."She'll be world leader soon."In addition to being a talented young actress - her previous films include Girl with a Pearl Earring and Mansfield Park - Anna is the granddaughter of the former High Court judge Sir Oliver Popplewell.